Libby
How to turn pages listening to Libby audiobooks
iPad, iPadOS 16
See Libby Help on assistance with using their app, or contact their support staff.
I would assume audiobooks do not have pages as such, and listening would be fluent from start to the next chapter or section, and any on-screen text would follow the audio. There would be buttons and a progress bar to navigate a 15 sec. time jump, or at once to the next chapter or section, or swipe gently over the cover artwork if you want to skip ahead (or back).